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Professional Manufacturer of Unsaturated Polyester Resins

 
1.UPR Resin for SMC/BMC
2.UPR Resin For Marine 
3.UPR Resin For General Purpose
 
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What Is Unsaturated Polyester Resin

Unsaturated Polyester Resin (UPR) is one of the high-performance composite materials.
Especially for applications like Sheet Molding Compound (SMC) and Bulk Molding Compound (BMC). These materials are known for their strength, flexibility, and ability to take on complex shapes.

 

UPR is created by the polycondensation of unsaturated dicarboxylic acids (like maleic anhydride) with glycols (like propylene glycol). The final product is a syrupy resin that, when mixed with a curing agent (usually styrene), hardens into a solid thermoset plastic.

 

We specialize in producing high-performance unsaturated polyester resins (UPR). Equipped with advanced facilities and a skilled R&D team, we empower customers with tailored solutions for diverse composite applications.

UPR Resin For SMC

Common SMC Resin Formulations

SMC application  Resin LSA Magnesium oxide paste resin(MgO) 
Sanitary JL 9320 JL 9218 Customised
Water tank JL 1325 JL 9213 Customised
Automotive parts JL  1300 JL 9212 Customised

Advantage of SMC Resin

UPR RESIN 01

 

Superior Surface Finish

 

 
 

SMC parts molded with our resins achieve Class-A surface finish
UPR RESIN 01

 

Mechanical Strength


UPR-based SMC delivers high tensile, flexural, and impact strength—essential for automotive and industrial applications.
UPR RESIN 01

 

High Productivity

 
 

Annual sales volume of SMC/BMC resin exceeds 20,000 tons, ranking among China’s top 3 in both quality and production capacity. 
24 Hours
 
 
Quick Response
Stock & Sample
 
Is Free & Available
Technical & Support
 
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Fast Delivery
 
Fast Prodcution & On-time Delivery

UPR Resin For Marine

MARINE-
UPR resin for Marine include hand lay-up processes, vacuum infusion processes, RTM processes, etc.

Mould resins are also available.

UPR Resin For General Purpose

Package and Shelf Life of UPR Resin

  • Package
    220kg or 1100kg
  • Shelf life
    - 3months under 25ºC,away from  heat sources, direct sunlight or steam pipes,rain etc.
    - Keep sealed to prevent moisture pick-up and monomer loss.

Can't Find Ideal Unsaturated Polyester Resins？

Professional Techincal Team

We specialize in producing high-performance unsaturated polyester resins (UPR). Equipped with advanced facilities and a skilled R&D team, we empower customers with tailored solutions for diverse composite applications.


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Specialized in product
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Specialized in product

About JLON: The Leading Unsaturated Polyester Resins  Supplier

Changzhou JLON Composite Co. has established itself as a leading supplier of carbon fiber fabric. Our products including unidirectional carbon fiber fabric/woven carbon fiber fabric/muitiaxial carbon fiber fabric/prepreg carbon fiber fabric/carbon fiber laminates.
Application include construction, marine, pultruded profiles, transportation, wind energy, and sports.
As a one-stop source for high performance materials, we pride ourselves on our ability to meet diverse customer needs with stable quality and competitive prices.
Unsaturated Polyester Resin UPR 03_副本
Unsaturated Polyester Resin UPR 04_副本

Welcome To Visit JLON

Cooperation Process

Unsaturated Polyester Resin FAQ

  • Q How to choose PVC foam core density for marine applications?

    A 60-80kg/m3: ideal for non-structural or light loaded parts like interiors.
    80-100kg/m3: the most common range for hulls and decks.
    130-200kg/m3: for high load areas such as keel line, engine mountings, and fittings.

  • Q Is PVC foam core suitable for UAV structures?

    A Yes. PVC foam is widely used for non-structure or light-loaded components like fairings or internal liners.
     

  • Q Is PVC foam core suitable for boat hull structures?

    A Yes, PVC foam core is ideal for boat hull. It has lightweight and high strength, excellent water resistance, high impact resistance.

  • Q What is the difference between PVC foam core and PET foam?

    A PVC foam core has higher strength, low water absorption while PET foam core has lower strength and cost. PVC foam core is better for boat hull, decks and bulkheads while PET foam core is more suitable for boat interiors and cost sensitive structures. 

  • Q PVC foam core vs PMI foam: which one is better?

    A PVC foam core is better for processing temperature under 120° C  while PMI foam is recommended for higher temperature between 150-220 ° C.

  • Q Foam core vs honeycomb: which is better for marine applications?

    A Stick with foam cores especially PVC foam core if you ’ re not looking for ultra-lightweight. Foam cores have closed-cell, which are water resistance while honeycomb has high risk of water ingress.

  • Q Can PVC foam core be used in vacuum infusion or RTM?

    A PVC foam core can be used in vacuum infusion and RTM. Hand layup is also suitable.
     

  • Q What thickness of PVC foam core is commonly used in boat decks?

    A Small watercrafts: 10-15mm
    Mid-size yachts: 20-25mm
    Large yachts: 25mm and above
    This is just for reference. Density is also a key factor determining thickness. Higher density provides better strength at the same thickness

  • Q Which core material is better for UAV, PVC or PMI foam?

    A PMI foam is the optimal material for UAV critical structures like fuselage, wings and propeller blades because it has the highest strength and stiffness among all rigid foams.

  • Q Do you have certificate?

    A Yes, we have DNV certificate.

Consult Your UPR Resin Expert

We help you avoid the pitfalls to deliver the quality and value your UPR Resin need, on-time and on-budget.
Get In Touch
info@jloncomposite.com
+8619306129712
NO.2-608 FUHANYUAN,TAIHU RD, CHANGZHOU,JIANGSU ,CHINA
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